WO2023024567A1 - 一种基于感应膜及内置式口袋的智能吸收用品及相关装置 - Google Patents
一种基于感应膜及内置式口袋的智能吸收用品及相关装置 Download PDFInfo
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- WO2023024567A1 WO2023024567A1 PCT/CN2022/091190 CN2022091190W WO2023024567A1 WO 2023024567 A1 WO2023024567 A1 WO 2023024567A1 CN 2022091190 W CN2022091190 W CN 2022091190W WO 2023024567 A1 WO2023024567 A1 WO 2023024567A1
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Images
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
- A61F13/49—Absorbent articles specially adapted to be worn around the waist, e.g. diapers
- A61F13/496—Absorbent articles specially adapted to be worn around the waist, e.g. diapers in the form of pants or briefs
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/42—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators with wetness indicator or alarm
- A61F2013/422—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators with wetness indicator or alarm the alarm being a colour change
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/42—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators with wetness indicator or alarm
- A61F2013/424—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators with wetness indicator or alarm having an electronic device
Definitions
- the invention relates to an absorbent article, in particular to an intelligent absorbent article and a related device based on a capacitive sensing film and a built-in pocket.
- Disposable absorbent products include sanitary products such as diapers, diapers, sanitary napkins, and urine pads. They are disposable care products and should be replaced as needed during use. If they are replaced too early/too frequently, it will increase Workload and cause waste; if it is changed too late, it is easy to cause leakage, and excrement irritates the skin for a long time and is easy to cause skin diseases. Therefore, people look forward to an intelligent disposable absorbent product that can detect moisture in real time and prompt replacement at an appropriate time, which is of positive significance to the scientific use of the product.
- Chinese Patent Publication No. CN107174408B discloses an absorbent article and a related method, which realizes accurate, reliable and reliable electrolytic capacitor based electrolytic capacitors by arranging two induction lines (flexible electrodes) on the outer surface of the bottom film of diapers.
- the quantitative urine wetness detection function is one of the most representative solutions in the existing technology.
- a sensor When it is used, a sensor will be attached to the outer surface of the diaper, and then the movable buckle of the sensor will be opened and the probe will be aligned with the induction line of the diaper to clamp it, so that it can be connected with the induction line and detect the diaper in real time. It's wet.
- the disadvantages of the above-mentioned prior art mainly include: 1.
- the induction line is printed on the outer surface of the bottom film of the diaper with carbon ink, which will produce two black lines and affect the appearance of the diaper.
- the sensing line set on the outer surface of the diaper bottom film is easily affected by external moisture. For example, touching the diaper with wet hands will cause false triggering. 3. It is difficult to effectively fix the sensor on the outside of the diaper. 4.
- the sensor needs to be pierced through the outer non-woven fabric of the diaper with a probe to connect with the sensing line, which is prone to poor contact. 5.
- the alignment between the sensor and the sensing line depends on the naked eye and experience, which is prone to misalignment and cause connection failure.
- Cipheral Patent Publication No. CN1226855A discloses a wet detection device for diapers etc. and a diaper with such a device. Pocket, and then use the elasticity of the content pocket to fix the sensor. The sensor outside the diaper is connected to the sensing line in the diaper through capacitive coupling to realize the wetness detection function.
- Its main disadvantages include: 1. The sensor and the induction line are not in face-to-face contact, so it is difficult to realize reliable electrical connection. 2. The storage pocket and the induction line are respectively located on the inner and outer sides of the diaper, which is prone to misalignment. 3. The sensing line detects wetness by contact with urine.
- the measures taken by the present invention mainly include: 1. Set the induction line inside the diaper to solve the problem of the induction line. Problems that affect the appearance of diapers and are affected by external moisture. 2. Set up a short-circuit protection mechanism in the diaper to protect the sensing line from the moisture inside the diaper, and realize the accurate, reliable and quantifiable moisture detection function based on electrolytic capacitors. 3. Set a pocket inside the diaper to solve the problem of fixing the sensor. 4. Make the contacts of the sensor face-to-face with the induction line to solve the reliability problem of the electrical connection. 5.
- the present invention provides a smart absorbent article based on a capacitive sensing film and a built-in pocket, including a disposable absorbent article, a capacitive sensing film, a built-in pocket, and a short-circuit protection mechanism.
- the article includes a surface layer, an absorption layer and a bottom film.
- the sensing film includes a contact surface, a sensing surface, a dielectric layer and at least two sensing lines. The outer surface of the dielectric layer constitutes the sensing surface, and the dielectric layer separates and insulates the sensing line from the sensing surface.
- the sensing line When the sensing surface is wetted by a liquid containing electrolyte, the sensing line can pass through the dielectric layer and realize the moisture detection function for the sensing surface in the form of electrolytic capacitance.
- the built-in pocket is used to insert the sensor for moisture detection.
- the contact surface is between the sensor and the sensor. The face-to-face contact and electrical connection of the sensing wire is facilitated, and the short-circuit protection mechanism is used to protect the sensing wire from moisture inside and outside the disposable absorbent article.
- the short-circuit protection mechanism includes a waterproof covering layer, the waterproof covering layer covers the contact surface, and the contact surface and the waterproof covering layer include mutually detachable parts and constitute Built-in pocket, the sensing surface faces the absorbing layer, so that the sensing line can pass through the dielectric layer and realize the moisture detection function for the absorbing layer in the form of electrolytic capacitance.
- the sensing film includes a single-sided sensing film
- the dielectric layer includes a plastic film substrate
- the sensing line is arranged on one side of the plastic film substrate and constitutes a contact surface
- the other side of the plastic film substrate constitutes a sensing surface
- the bottom film forms a contact surface.
- Waterproof cover layer the contact surface faces the base film and includes mutually separable parts with the base film to form an internal pocket
- the absorbent layer covers the sensing side
- the top layer covers the absorbent layer
- the top layer goes beyond the absorbent layer and the sensing side Parts of the face and the base film are bonded to each other, thereby fixing the internal pocket so that it is consistent with the width of the sensing film and aligned in the center; or
- the sensing film includes a composite sensing film, the dielectric layer includes a plastic film substrate, the sensing line is arranged on one side of the plastic film substrate and constitutes a contact surface, the other side of the plastic film substrate constitutes a sensing surface, and the sensing film includes a contact area and Sensing area, the sensing area includes a waterproof protective layer and protects the sensing line, the bottom film constitutes a waterproof covering layer, the contact surface and the waterproof protective layer face the bottom film, the absorbing layer covers the sensing surface, the surface layer covers the absorbing layer, and the surface The part of the layer beyond the absorbent layer and the sensing surface is bonded to the base film, thereby securing the internal pocket and aligning its width with the sensing film and centering it; or
- the sensing film includes a composite sensing film.
- the composite sensing film includes a plastic film substrate and a waterproof protective layer.
- the sensing line is arranged on one side of the plastic film substrate.
- the composite sensing film includes a contact area and a sensing area.
- the sensing area includes a waterproof The protective layer, the waterproof protective layer faces the absorbent layer and constitutes the dielectric layer, the sensing film is located between the surface layer and the base film and includes mutually bonded parts with the surface layer, the waterproof cover layer and the base film, thereby fixing the inner pocket and making it Its width is the same as that of the sensing membrane and is centered; or
- the sensing film includes a head-to-tail type built-in pocket sensing film, the sensing film includes a plastic film substrate, the sensing line is arranged on one side of the plastic film substrate, the waterproof covering layer covers the sensing line, the waterproof covering layer and the plastic film substrate At the same time, it includes a part that is bonded to each other and a part that can be separated from each other. The part that is bonded to each other is located in the middle of the sensing film and constitutes the sensing area.
- the outer surface of the pocket, plastic film substrate or waterproof covering faces the absorbent layer and its outer surface constitutes the sensing surface; or
- the sensing film includes a through-type built-in pocket sensing film, the sensing film includes a plastic film substrate, the sensing line is arranged on one side of the plastic film substrate and constitutes a contact surface, and the other side of the plastic film substrate faces the absorbing layer and constitutes a sensing surface , the plastic film substrate constitutes the dielectric layer, and the waterproof covering layer covers the contact surface.
- the hollow portion included between the film substrates constitutes a through-type built-in pocket; or
- the sensing film includes a composite bottom film type sensing film, the sensing line is arranged on the outer surface of the bottom film to form a contact surface, the inner surface of the bottom film faces the absorbing layer to form a sensing surface, the bottom film forms a dielectric layer, and the waterproof covering layer includes an integrated cutting an intact outer nonwoven covering the contact surface and comprising mutually separable parts free of adhesive and forming internal pockets between the outer nonwoven and the backing film; or
- the sensing film includes a composite bottom film type sensing film and an outer layer of non-woven fabric.
- the sensing line is arranged on the outer surface of the bottom film to form a contact surface.
- the inner surface of the bottom film faces the absorbing layer to form a sensing surface.
- the outer layer of non-woven fabric is covered on the waterproof cover layer, and the part beyond the waterproof cover layer is bonded to the base film, thereby fixing the internal pocket and making its width consistent with the waterproof cover layer.
- the disposable absorbent article includes a concealed opening in the interlayer gap at the front edge leading to a built-in pocket for inserting a sensor for wetness detection;
- Each of the interlayer gaps at the front edge and the rear edge of the disposable absorbent article includes a hidden opening, each of which leads to a built-in pocket, wherein the built-in pocket at the front edge constitutes a functional pocket for A sensor is inserted for wetness detection, while a built-in pocket at the rear edge constitutes a redundant pocket, providing error redundancy for positioning cut-offs in the production of smart absorbent articles; or
- a cutout is included on the outer surface of the disposable absorbent article or on the inner surface of the front edge of the disposable absorbent article, and the cutout leads to a built-in pocket for inserting a sensor to realize the wetness detection function.
- the disposable absorbent article includes the front abdomen patch and the left and right patches, and at least a part of the built-in pocket is located within the orthographic range of the front abdomen patch; when the disposable absorbent article is in the wearing state, the elastic force generated on the waist can be converted into The force of attaching the built-in pocket to the front abdomen of the user can press the sensor in the built-in pocket and make the contact of the sensor and the sensing line more reliable; and when the disposable absorbent article is in the In the non-wearing state, the force attached to the user's front abdomen will automatically disappear and the sensor can be easily removed; or
- the disposable absorbent article includes an elastic waist, and the built-in pocket is arranged on the elastic waist.
- the elastic force generated on the waist can be converted into a force that sticks the built-in pocket to the user's body, thus The sensor in the built-in pocket can be pressed tightly and the contact between the contact of the sensor and the induction line is more reliable.
- disposable absorbent products include diapers, diapers, sanitary napkins or urine pads, the surface layer includes hydrophilic non-woven fabrics, the absorbent layer includes polymer absorbent materials, the bottom film includes breathable or air-impermeable PE film, and the induction line includes Ink line printed with conductive ink, metal line or aluminum foil line, copper foil line formed by physical vapor deposition, plastic film base material includes PE, PP, CPP, BOPP or PET film, waterproof covering layer includes plastic film, waterproof paper Or water-repellent non-woven fabric, the waterproof protective layer includes a polymer waterproof coating or a polymer waterproof composite layer; and
- the induction wire, the dielectric layer and the liquid together form an electrolytic capacitor, wherein the induction wire constitutes the electrode of the electrolytic capacitor, the dielectric layer constitutes the dielectric of the electrolytic capacitor, and the liquid constitutes the electrolytic capacitor
- the electrolyte, the humidity of disposable absorbent articles is proportional to the capacitance of the electrolytic capacitor, the capacitance is proportional to the area corresponding to the liquid and the induction line, proportional to the dielectric constant of the dielectric layer, and inversely proportional to the thickness of the dielectric layer .
- the present invention also provides a capacitive sensing film suitable for making smart absorbent products, including head and tail built-in pockets, including a plastic film substrate, a waterproof covering layer and at least two sensing lines, the sensing lines are arranged on the plastic film
- the waterproof covering layer covers the sensing line
- the waterproof covering layer and the plastic film substrate include mutually bonded parts and mutually separable parts, and the mutually bonded parts constitute a short-circuit protection mechanism , to prevent the liquid from penetrating into and causing the short circuit of the sensing line, and the parts that can be separated from each other form a functional pocket and a redundant pocket at the head and tail positions of the sensing film, and the sensing line is exposed in the functional pocket and forms a contact face for face-to-face contact and electrical connection with the contacts of the sensor inserted into the built-in pocket; and
- the plastic film base material or waterproof covering layer constitutes the dielectric layer, and its outer surface constitutes the sensing surface.
- the sensing line can pass through the dielectric layer and realize the wet state detection of the sensing surface in the form of electrolytic capacitance.
- the detection sensitivity is proportional to the dielectric constant of the dielectric layer. , which is inversely proportional to the thickness of the dielectric layer;
- Induction lines include ink lines printed with conductive ink, metal lines or aluminum foil lines, copper foil lines formed by physical vapor deposition, plastic film substrates include PE, PP, CPP, BOPP or PET films, and waterproof covering layers include plastic films , waterproof paper, water-repellent non-woven fabric or hot-melt adhesive film.
- the present invention also provides a capacitive sensing film including a through-type built-in pocket suitable for making smart absorbent products, including a plastic film base material, a waterproof covering layer and at least two sensing lines, and the sensing lines are arranged on the plastic film base.
- a capacitive sensing film including a through-type built-in pocket suitable for making smart absorbent products, including a plastic film base material, a waterproof covering layer and at least two sensing lines, and the sensing lines are arranged on the plastic film base.
- the waterproof covering layer is covered on the induction wire and the plastic film substrate, and the two sides of the waterproof covering layer and the plastic film substrate include mutually bonded parts at the edges and thus create a barrier that prevents the penetration of liquids.
- the boundary also constitutes a short-circuit protection mechanism, so that the sensing line is effectively protected, and the hollow part between the waterproof covering layer and the plastic film substrate forms a through built-in pocket, and the sensing line is exposed in the built-in pocket and constitutes the contact surface , for face-to-face contact and electrical connection with the contacts of the sensor inserted into the built-in pocket; and
- the plastic film substrate constitutes the dielectric layer, and its outer surface constitutes the sensing surface.
- the sensing line can pass through the dielectric layer and detect the wet state of the sensing surface in the form of electrolytic capacitance.
- the detection sensitivity is proportional to the dielectric constant of the dielectric layer, and is proportional to the dielectric layer is inversely proportional to the thickness;
- the two ends of the penetrating built-in pocket constitute functional pockets and redundant pockets respectively.
- the induction lines include ink lines printed with conductive inks, metal lines or aluminum foil lines, copper foil lines formed by physical vapor deposition, and plastic film substrates.
- the material includes PE, PP, CPP, BOPP or PET film, and the waterproof covering layer includes plastic film, waterproof paper, water-repellent non-woven fabric or hot-melt adhesive film.
- the present invention also provides a system device for realizing the monitoring of the wet state of smart absorbent articles, which includes a smart absorbent article with a sensor. Electrically connected, the sensor also includes a capacitive detection device, which is used to realize the moisture detection function of the disposable absorbent article through electrolytic capacitance.
- the senor includes at least three contacts, two of which form the insertion detection device, and are used to trigger the insertion detection device when the sensor is inserted into the built-in pocket and the two contacts touch the same induction line
- the sensor enters the working state.
- the sensor also includes a wireless transmitting device and a wireless receiving device, which are used to send and receive the wet state information of the disposable absorbent articles wirelessly.
- the wireless receiving device includes a sound or light prompt device, a smart phone or a personal computer.
- the beneficial effect of the present invention is to solve all the deficiencies of the prior art mentioned in the background art one by one, including: 1.
- the induction line is successfully arranged inside the diaper, eliminating the influence of the color of the induction line on the appearance of the diaper. 2.
- the induction line is short-circuit protected and is no longer affected by the moisture inside and outside the diaper. 3.
- the content pocket set in the diaper can more effectively accommodate and fix the sensor. 4.
- the face-to-face contact between the sensor and the induction line is realized and the connection becomes more reliable. 5.
- Automatic centering and alignment are realized between the built-in pocket and the sensing film to avoid misalignment.
- the induction film can be used as a general production material, which has wider versatility and convenience. 7.
- the elastic force produced on the waistline when the diaper is worn is cleverly used to fix the sensor and make the connection between the sensor and the induction line more reliable.
- the technical solution of the invention effectively improves product reliability and ease of use, and creates favorable conditions for the development and intelligent upgrading of the paper diaper industry.
- Fig. 1 is a schematic diagram of the appearance and structure of a smart absorbent article according to an embodiment of the present invention when it is used together with a sensor.
- 2A and 2B are a three-dimensional structural schematic diagram and a cross-sectional structural schematic diagram/equivalent circuit diagram of a single-sided sensing film suitable for the smart absorbent article of the embodiment of the present invention.
- 3A and 3B are the A-A' cross-sectional structural schematic diagram and B-B' cross-sectional structural schematic diagram/equivalent circuit diagram of a smart absorbent article using a single-sided sensing film according to an embodiment of the present invention.
- FIGS. 4A and 4B are schematic diagrams of the appearance structure of a smart absorbent article using a single-sided sensing film and a sensor in accordance with an embodiment of the present invention.
- FIG. 5A and FIG. 5B are a three-dimensional structural schematic diagram and a cross-sectional structural schematic diagram/equivalent circuit diagram of a composite sensing film suitable for the smart absorbent article of the embodiment of the present invention.
- 6A and 6B are the A-A' cross-sectional structural schematic diagram and B-B' cross-sectional structural schematic diagram/equivalent circuit diagram of a smart absorbent article using a composite sensing film according to an embodiment of the present invention.
- Fig. 7 is a schematic diagram of the appearance structure of a smart absorbent article using a composite sensor film and a sensor in accordance with an embodiment of the present invention.
- Fig. 8A, Fig. 8B and Fig. 8C are C-C' cross-sectional structural schematic diagrams of a smart absorbent product using a composite sensing film according to an embodiment of the present invention.
- Fig. 9A and Fig. 9B are the A-A' cross-sectional structure schematic diagram and B-B' cross-sectional structural schematic diagram/equivalent circuit diagram of a smart absorbent product using a composite bottom film-type sensing film according to an embodiment of the present invention.
- Fig. 10A and Fig. 10B are the front structural schematic diagram and the D-D' cross-sectional structural schematic diagram of a capacitive sensing film including head and tail built-in pockets suitable for the smart absorbent article of the embodiment of the present invention.
- Fig. 11A, Fig. 11B and Fig. 11C are a schematic view of the front structure of a capacitive sensing film including a through-type built-in pocket suitable for the smart absorbent article of the embodiment of the present invention, a schematic view of the EE' cross-sectional structure, and a schematic view of the sensor when it is inserted. Schematic diagram of the location relationship.
- Fig. 12 is a schematic diagram of the appearance structure of the elastic waist of the intelligent absorbent article according to the embodiment of the present invention, which includes a built-in pocket.
- Fig. 13 is a schematic diagram of the exterior structure of the intelligent absorbent article according to the embodiment of the present invention, including a cutout leading to the built-in pocket.
- Fig. 14 and Fig. 15 are schematic diagrams of the appearance structure of the sensing film with a loop-shaped sensing line design and a plurality of sensing lines design suitable for the smart absorbent article according to the embodiment of the present invention.
- Fig. 1 is a schematic diagram of the appearance structure of a smart absorbent article according to an embodiment of the present invention when it is used together with a sensor, and its appearance is almost the same as that of a traditional disposable absorbent article.
- Diapers are the most representative of disposable absorbent products.
- the embodiment of the present invention will mainly use diapers as an example. The relevant descriptions are also suitable for pull-up pants, training pants, growing pants, diapers, and sanitary napkins. , maternity towels, urine pads and other disposable absorbent products, in most cases the paper diapers discussed in the embodiments of the present invention have the same meaning as disposable absorbent products.
- the intelligent absorbent article 10 of the embodiment of the present invention is realized by adding some materials or devices that can sense (detect) urine wetness (wetness) on the basis of traditional diapers. These materials and devices make the diapers smart, so the It's called smart diapers. Diapers usually include a base film (leakage-proof layer), an absorbent layer (interlayer), a surface layer (dry layer), an outer non-woven fabric (composite layer) and other components.
- the base film usually includes a breathable or non-breathable polyethylene film (PE), the absorbent layer usually includes polymer absorbent material (SAP) and wood pulp, the surface layer usually includes soft and comfortable hydrophilic non-woven fabric, and the outer non-woven fabric is usually combined with the bottom film to form a composite bottom film, which can make The base film has a better feel and increases the strength of the base film.
- PE polyethylene film
- SAP polymer absorbent material
- wood pulp wood pulp
- the surface layer usually includes soft and comfortable hydrophilic non-woven fabric
- the outer non-woven fabric is usually combined with the bottom film to form a composite bottom film, which can make
- the base film has a better feel and increases the strength of the base film.
- the front/front end 18 of the diaper may also be referred to as the front abdomen, front waist or pant top, and the rear/rear end 19 of the diaper may also be referred to as the back, rear waist or trouser tail.
- a typical diaper may also include left and right stickers/adhesive stickers/velcro stickers 16 and 17, which are respectively located on the left and right sides of the front abdomen of the diaper, and will be pasted on the front belly sticker/front waist sticker 25 during use to pull the waist circumference of the diaper. Tight to prevent the diaper from slipping off.
- the embodiments of the present invention are mainly realized by arranging a capacitive sensing film (sensing film for short) material including detection electrodes inside the diaper.
- the sensing film includes at least two detection electrodes/flexible electrodes/wetting sensing lines (collectively referred to as sensing lines).
- the sensing film 40 in this embodiment includes a first sensing line 21 and a second sensing line 22 .
- the sensing line usually starts from the front edge of the diaper, crosses the absorbent layer 12 area (crotch) of the diaper to or approaches the rear edge of the diaper, so as to detect the wetness of the entire diaper.
- the intelligent absorbent article of the embodiment of the present invention also includes a built-in pocket 26 under the front belly sticker 25, which can accommodate the sensor 30, and at least a part of the sensor film/sensing line is located in the pocket, so as to communicate with the sensor inserted into the pocket. contact and make electrical connections.
- the induction film 40 and the built-in pocket 26 can be arranged between the bottom film and the surface layer of the diaper or between the bottom film and the outer non-woven fabric.
- the gap of the interlayer at the front edge of the diaper is used as the opening of the built-in pocket 26 for inserting the sensor.
- the sensor 30 includes two contacts 31, 32, which are in face-to-face contact with the exposed first and second induction lines 21, 22 in the built-in pocket respectively and are electrically connected, and can detect the moisture of the absorbing layer by means of electrolytic capacitance. state, and thus realize the wet detection function of diapers.
- the sensing film in the embodiment of the present invention is a flexible film, which includes two outer surfaces, and the side in contact with the excrement/liquid to be tested is called the sensing surface.
- the sensing film can usually be divided into a contact area and a sensing area.
- the sensing area usually corresponds to the absorbent layer of the diaper and is mainly used to detect the wet state of the diaper, while the contact area is mainly used to contact with the contact point of the sensor and implement electrical contact.
- the plane in contact with the sensor contact is called the contact surface, at least a part of the contact surface is located in the built-in pocket 26, and at least a part of the induction line is exposed on the contact surface, so as to implement electrical connection with the contact of the sensor .
- the sensing line in the embodiment of the present invention is non-contact with the liquid to be tested, and the sensing line can detect the wetness of the diaper through non-contact capacitive sensing (capacitive coupling).
- the embodiment of the present invention also includes a short circuit protection mechanism, the purpose of which is to prevent the sensing line from contacting the liquid containing the electrolyte to cause a short circuit, resulting in detection failure or false triggering. Since the sensing film is set inside the diaper, the diaper of the embodiment of the present invention has no difference from the traditional diaper from the outside, and the sensing film/sensing line has almost no influence on the appearance of the diaper.
- the sensing film 40 of this embodiment is a single-sided capacitive sensing film, which includes a film substrate 45 and a first sensing line 21 and a second sensing line 22 arranged on one side of the film substrate. touch/permeate/pass through the film substrate 45 and detect the wet state on the other side of the film substrate in an electrolytic capacitance manner.
- the induction line of the embodiment of the present invention generally comprises the ink line (conductive film) of conductive ink (such as carbon paddle, silver paste) printing, the metal line (metal film) of physical vapor deposition (such as vacuum evaporated aluminum) or aluminum foil line, copper foil wire etc.
- the side of the film substrate 45 provided with the sensing line is called the contact surface 61, and the other side is called the sensing surface 62, and the film substrate 45, which is separated and insulated from the sensing line and the sensing surface, is called a dielectric layer.
- film substrates include PE (polyethylene), PP (polypropylene), CPP (cast polypropylene), BOPP (biaxially oriented polypropylene), PET (polyester) and other plastic films, so they can also be called
- the thickness of the plastic film substrate is generally between 5 microns and 50 microns.
- the sensing lines 21, 22 will contact the liquid 14 and the plastic film substrate. 45 together constitute the electrolytic capacitor C1, wherein the induction lines 21, 22 constitute the electrodes of C1, the plastic film substrate 45 constitutes the dielectric of C1, the liquid 14 constitutes the electrolyte (electrolyte) of C1, and the capacitance of C1 is inversely proportional to the thickness of the dielectric, It is proportional to the dielectric constant of the dielectric, and proportional to the area corresponding to the liquid and the electrode (sensing line). By reading the capacitance value of C1, the quantitative (quantitative) wet state on the sensing surface can be accurately known.
- electrolyte such as urine containing salt, dilute stool, sweat, menstrual blood, blood, etc.
- the electrolytic capacitance of the embodiment of the present invention is based on the conductivity of human excrement, which is different from the medium produced by some prior art that regards urine as a non-conductive liquid with a high dielectric constant (such as 80).
- Capacitors are fundamentally different. In fact, there are some dielectric capacitances that have nothing to do with the electrolytic capacitance between the first and second sensing lines in the embodiment of the present invention, but these dielectric capacitances will be much smaller than the electrolytic capacitance when the diaper is wet, so the embodiment of the present invention will ignore these Dielectric capacitance is not discussed only for electrolytic capacitance produced by electrolyte liquid.
- Fig. 3A and Fig. 3B are the A-A' cross-sectional structural schematic diagram and B-B' cross-sectional structural schematic diagram/equivalent circuit diagram related to Fig. 1 of a smart absorbent article using a single-sided sensing film according to an embodiment of the present invention.
- the first and second induction lines 21 and 22 are arranged on the plastic film substrate 45 to form a single-sided induction film and arranged between the diaper surface layer 11 and the bottom film 15, at the AA' section (Fig. 3A)
- the contact surface 61 faces the bottom film 15 and includes mutually detachable parts with the bottom film and constitutes the built-in pocket 26.
- the sensor 30 can be arranged in the built-in pocket 26, which includes contacts 31, 32 This side of the contact surface is closely attached to the contact surface 61 and is in face-to-face contact with the exposed sensing lines 21 and 22 on the contact surface and is electrically connected.
- the built-in pocket 26 of this embodiment is close to the front edge 18 of the diaper. Since there is no absorbent layer 12 there, the surface layer 11 will be directly attached to the sensing surface 62, which exceeds the portion of the sensing surface/sensing film in width. Adhesives 28 (including hot melt adhesives, structural adhesives, etc.) will be bonded to the bottom film 15 and form the adhesive boundary of the built-in pocket 26, which can not only prevent moisture from penetrating into the contact surface 61 and cause the induction lines 21, 22 to short circuit, At the same time, the sensing film can be effectively fixed, and the width of the built-in pocket 26 is automatically kept consistent with the width of the plastic film substrate 45.
- Adhesives 28 including hot melt adhesives, structural adhesives, etc.
- the sensing film and the built-in pocket can be automatically centered and aligned to ensure insertion.
- the contact points 31, 32 of the sensor of the pocket can be aligned with the induction lines 21, 22 on the contact surface 61 and realize reliable electrical connection.
- the built-in pocket 26 is arranged under the front abdomen sticker 25, and at least a part of the built-in pocket 26 is located within the range of the front projection of the front abdomen sticker 25.
- the elastic force can be converted into the active force (downward active force in the figure) that the built-in pocket 26 is attached to the user's front abdomen by the left and right stickers 16, 17, thereby also pressing the sensor 30 in the pocket and making it
- the contact between the contact point and the induction line is more reliable.
- the force attached to the user's front abdomen will automatically disappear and the sensor 30 will be easy to take out.
- the pockets arranged on the outer surface of the diaper cannot do this.
- the absorbing layer 12 and the sensing surface 62 are pasted together, and the sensing lines 21, 22 can pass through the plastic film substrate 45 as the dielectric layer and detect with electrolytic capacitance
- the moisture 14 on the absorbent layer 12 can thus realize the moisture detection function for the absorbent layer of the diaper, and the moisture level is proportional to the electrolytic capacitor C1.
- the contact surface 61 will be bonded to the bottom film 15 through the adhesive 28, which can effectively prevent the moisture in the absorbent layer 12 from penetrating into the contact surface 61 and short-circuiting the induction lines 21 and 22.
- the bottom film 15 covers the entire contact surface 61 of the sensing film, so the bottom film 15 can be regarded as a waterproof covering layer and constitutes an integral part of the short circuit protection mechanism of the embodiment of the present invention.
- FIG 4A and Figure 4B are schematic diagrams of the appearance structure of a smart absorbent product using a single-sided sensing film and a sensor when used in conjunction with an embodiment of the present invention, which includes a diaper, a single-sided sensing film 40, a built-in pocket 26 and a short circuit Protection mechanism and other components.
- the diaper includes a top layer 11, an absorbent layer 12 and a bottom film 15, and the top layer 11 and the bottom film 15 are overlapped because of the same size.
- the contact surface 61 of the sensing film 40 is closely attached to the bottom film 15, and the sensing surface 62 of the sensing film 40 is facing the absorbing layer.
- the sensing lines 21 and 22 can detect the wet state of the absorbing layer 12 through electrolytic capacitance.
- the bottom film 15 is used as a waterproof covering layer to implement short-circuit protection for the induction lines 21, 22 on the contact surface 61.
- Each includes a part that can be separated from each other and constitutes a built-in pocket 26, 26', wherein a functional pocket 26 is formed at the front edge 18 of the diaper, which is used to insert the sensor and make the contact of the sensor and the induction line implement electrical contact.
- a redundant pocket 26' is connected, and formed at the rear end edge 19 a redundant pocket 26', which can provide error redundancy for positioning and cutting in the production of smart diapers. In the production process of diapers, each pair of diapers was originally connected end to end.
- the original built-in pocket would be divided into two parts.
- the two cuts are divided into two parts and are respectively located at the front and rear edges of the diaper and form pockets 26 and 26'.
- the sensing film 40 also includes a color positioning mark (color code) 42 .
- the sensing film of the embodiment shown in Figure 4B it is completely symmetrical. In this case, no positioning is required. Just put the sensing film on a specific layer in the diaper and use it. This symmetrical structure can Increase the versatility and convenience of the induction film, and can adapt to the production of smart diapers of different specifications and lengths.
- the sensing film 40 is usually pasted on the bottom film 15 first, then the absorbent layer 12 is covered on the sensing film 40 and bonded, and then the surface layer 11 is covered on the absorbent layer 12 and bonded.
- the surface layer beyond the absorbent layer 12 will be directly bonded to the base film 15, all of which can create an adhesive boundary that prevents moisture from penetrating into the absorbent layer, such as in Figure 4A where the bonded area 28/28' is on the absorbent layer 12 and the bottom film 15, which respectively constitute a bonding boundary on both sides of the sensing film 40.
- FIG. 1 Another example is that in Fig.
- the bonding area 28/28' is produced by bonding between the edges of the two sides of the sensing film and the base film 15, except that the bonding boundary is formed on both sides of the sensing film, it is formed on the contact surface 61
- the sensing film of the area outside the range of the built-in pocket 26/26' can also be bonded to the bottom film 15, and these bonding can make the sensing line 21, 22 are more effectively protected.
- the sensing line 21, 22 are more effectively protected.
- the sensing film of the area outside the range of the built-in pocket 26/26' can also be bonded to the bottom film 15, and these bonding can make the sensing line 21, 22 are more effectively protected.
- the sensing film of the area outside the range of the built-in pocket 26/26' can also be bonded to the bottom film 15, and these bonding can make the sensing line 21, 22 are more effectively protected.
- an induction line in the area inside the built-in pocket it can constitute a contact area, which is used to contact and implement electrical connection with the contact of the inserted sensor;
- the presence of lines (for example, the area from 41 to 41' in FIG. 4B ) can constitute a sensing area, which is mainly used for wet detection of the absorbent layer of diapers.
- FIG. 5A and FIG. 5B are a three-dimensional structural schematic diagram and a cross-sectional structural schematic diagram/equivalent circuit diagram of a composite sensing film suitable for the smart absorbent article of the embodiment of the present invention.
- the difference from the aforementioned single-sided sensing film is that at least a part of the sensing line in this embodiment is located in a waterproof interlayer composed of two waterproof materials to form a composite film, so it can be called a composite capacitive sensing film.
- a waterproof protective layer 46 is also included, which covers the induction lines 21, 22 and together with the plastic film substrate 45
- a waterproof interlayer is formed to sandwich the induction wires, and the waterproof protection layer 46 in the embodiment of the present invention includes a polymer waterproof coating or a polymer waterproof composite layer/covering layer.
- the area 47 covered by the plastic film base material 45 and the waterproof protective layer 46 of the induction line is the induction area of the induction film.
- the induction line can realize the moisture detection on the outer surface 62 through the plastic film base material 45, and can be protected by waterproofing.
- Layer 46 implements moisture detection on its outer surface 63, so the composite sensing film of this embodiment has double-sided detection capabilities. In practical applications, the side facing the absorbing layer is usually regarded as the sensing surface, and the material that separates and insulates the sensing line from the sensing surface is regarded as the dielectric layer.
- an electrolytic capacitor C1 When the liquid 14A containing electrolyte is accumulated on the sensing surface 62, an electrolytic capacitor C1 will be generated between the sensing lines 21, 22, and its capacitance value is inversely proportional to the thickness of the plastic film substrate 45, and the dielectric with the plastic film substrate 45
- the electrical constant is proportional to the area corresponding to the liquid 14A and the electrode (sensing line).
- electrolytic capacitance C2 can be produced between the sensing lines 21, 22, and its capacitance value is inversely proportional to the thickness of the waterproof protective layer 46, and is inversely proportional to the dielectric of the waterproof protective layer 46.
- the constant is proportional to the area corresponding to the liquid 14B and the electrode (sensing line).
- the area 43 without the waterproof protective layer 46 on the sensing line is the contact area of the sensing film, and the sensing lines 21, 22 are exposed at the contact area 43 and form a contact surface 61, which can be used for contact with the sensor Make face-to-face contact and implement an electrical connection.
- the orientation of the contact surface 61 and the sensing surface 63 are consistent. Since the waterproof protective layer 46 is very thin, it can be considered that the contact surface 61 and the sensing surface 63 are on the same plane, but differ in position/area.
- Fig. 6A and Fig. 6B are the A-A' cross-sectional structural schematic diagram and B-B' cross-sectional structural schematic diagram/equivalent circuit diagram of a smart absorbent article using a composite sensing film according to the embodiment of the present invention.
- the sensing film includes plastic film substrate 45, contact surface 61, sensing surface 62, waterproof protection layer 46, sensing surface 63, first sensing line 21, second sensing line 22 and other components.
- this embodiment also includes a waterproof covering layer 24, which covers the contact area of the sensing film and corresponds to the contact surface 61 of the sensing film, and is connected to the waterproof covering layer 24 at the contact surface 61.
- a waterproof covering layer 24 There are parts that can be separated from each other and form a built-in pocket 26 .
- the waterproof covering layer 24 needs to have good waterproof performance.
- materials such as plastic film, waterproof paper, and water-repellent non-woven fabric can be used. constitute.
- the width of the waterproof covering layer 24 is generally not smaller than the plastic film substrate 45 so as to effectively cover the entire contact surface 61 .
- the surface layer 11 is covered on the waterproof cover layer 24, and the part beyond the waterproof cover layer 24 will be bonded with the base film 15 through the adhesive 28, and the part of the waterproof cover layer 24 that exceeds the plastic film substrate 45 in width will also Inter-bonding with the base film 15, all of which not only create a boundary that prevents moisture from penetrating in, but also allow the width of the internal pocket 26 to be automatically aligned and centered with the width of the sensing film/plastic film substrate 45 Alignment, this is a technical feature and beneficial effect of the embodiment of the present invention that adopts the induction film method to generate the built-in pocket.
- the outer surface 62 of the plastic film substrate 45 of the present embodiment is towards the bottom film 15, because there is no liquid between the plastic film substrate 45 and the bottom film 15, so the plastic film substrate 45 mainly It plays the role of bearing and protecting the induction line.
- B-B' section (Fig. 6B)
- the absorbent layer 12 is covered on the waterproof protective layer 46, and the part beyond the waterproof protective layer 46 in width will be bonded with the base film 15.
- the outer surface 63 of the waterproof protective layer 46 faces the absorbing layer and constitutes the sensing surface, so the waterproof protective layer 46 plays the role of a dielectric layer that separates and insulates the sensing line from the sensing surface in this embodiment, and the sensing line passes through the waterproof protective layer 46.
- the water content of the absorbing layer 12 is detected by means of electrolytic capacitance to realize the moisture detection function for the absorbing layer of diapers.
- Fig. 7 is a schematic diagram of the appearance structure of a smart absorbent article using a composite sensor film and a sensor in an embodiment of the present invention, which includes diapers, a composite sensor film 40, a built-in pocket 26, and a short circuit protection mechanism.
- the diaper includes a surface layer 11, an absorbent layer 12, and a bottom film
- the sensing film 40 includes first and second sensing lines 21, 22, and the part of the sensing film that is not covered by the waterproof covering layer 24/24' constitutes the sensing area
- the side of the sensing area facing the absorbing layer 12 constitutes the sensing surface.
- the surface layer 11 and the bottom film 15 cover the sensing film 40 and the absorbing layer 12 up and down. wet state.
- the waterproof covering layer 24/24' covers the contact surface of the sensing film, and the contact surface includes parts that can be separated from each other and respectively constitute a functional pocket 26 and a redundant pocket 26', wherein the functional pocket 26 is located in the diaper
- the redundant pocket 26' it is located at the rear edge 19 of the diaper, which mainly provides redundancy for the cutting error of the diaper, and the positioning mark 42 can provide positioning for the production of the smart diaper.
- the part of the waterproof covering layer 24/24' beyond the contact surface it will be bonded to the bottom film 15 and form a boundary to prevent moisture from penetrating into the absorbent layer, as shown in the shaded part in the figure.
- the contacts 31, 33 can constitute an insertion detection device.
- the insertion detection device can be triggered and the sensor enters a working state; and when the sensor 30 is taken out from the pocket 26, the insertion detection device can be shielded and the sensor enters a sleep/shutdown state to save power.
- Fig. 8A, Fig. 8B and Fig. 8C are the CC' cross-sectional structural schematic diagrams related to Fig. 7 of a smart absorbent article using a composite sensing film according to an embodiment of the present invention, which is a composite sensing film applied to smart diapers some specific examples.
- the figure includes a diaper composed of a surface layer 11, an absorbent layer 12, and a bottom film 15, and a composite sensing film 40 disposed in the diaper.
- the sensing film includes a plastic film substrate 45 and a waterproof protective layer 46, which constitute a waterproof interlayer
- the sensing lines 21 and 22 are protected, and the sensing lines can pass through the plastic film substrate 45 or the waterproof protective layer 46 as a dielectric layer and detect the wet state of the absorbing layer 12 in an electrolytic capacitance manner.
- the sensing line is exposed on the contact surface.
- the waterproof covering layer 24 can be covered on the contact surface 61, and the parts between the two can be separated from each other to form a built-in pocket 26 (as shown in Figures 8A and 8B).
- the covering layer 24 prevents moisture in the absorbing layer 12 from penetrating to the contact surface 61 and constitutes the short circuit protection mechanism of the embodiment of the present invention.
- the sensing film 40 can be arranged between the base film 15 and the absorbing layer 12 (as shown in Figure 8A and Figure 8C), and can be arranged between the surface layer 11 and the absorbing layer 12 (as shown in Figure 8B ); at the same time, the outer surface 63 of the waterproof protective layer 46 can be made towards the absorbing layer 12 to form a sensing surface (as shown in Figure 8A and Figure 8B), and the outer surface 62 of the plastic film substrate 45 can be formed towards the absorbing layer to form a sensing surface (as shown in Figure 8C).
- the bottom film 15 of the diaper can also be used as a waterproof covering layer to cover the contact surface 61, and Between the base film 15 and the contact surface 61 are separable parts and form a built-in pocket 26 (as shown in FIG. 8C ).
- Fig. 9A and Fig. 9B are the A-A' cross-sectional structural schematic diagram and B-B' cross-sectional structural schematic diagram/equivalent circuit diagram related to Fig. 1 of a smart absorbent article using a composite bottom film-type sensing film according to an embodiment of the present invention.
- the induction lines 21 and 22 in this embodiment are arranged on the outer surface of the bottom film 15 (facing away from the absorbent layer).
- the present embodiment will cover the outer surface of the bottom film 15 with an outer non-woven fabric 13, so that the outer non-woven fabric 13 plays the role of a waterproof covering layer, and the outer non-woven fabric 13 is also in contact with the bottom surface.
- the films 15 are bonded together by an adhesive to form a composite bottom film, so the sensing film in this embodiment can be called a composite bottom film type sensing film.
- an additional waterproof covering layer 64 can be seen between the base film 15 and the outer non-woven fabric 13 in the A-A section (FIG. 9A).
- the sensing lines 21 and 22 are generally printed on the outer surface of the base film 15 to form the contact surface 61, and then the waterproof covering layer 64 is pasted on the sensing lines 21 and 22, and the waterproof covering layer 64 and the contact surface 61 include parts that can be separated from each other and form a built-in pocket 26, and then the outer layer of non-woven fabric 13 is covered on the waterproof covering layer 64 and bonded to each other by adhesive 28, which exceeds the waterproof covering in width Part of the layer 64 is bonded to the base film 15, which, in addition to forming a boundary against the ingress of liquids and a short-circuit protection mechanism, also allows the width of the internal pocket 26 to be automatically aligned with the width of the waterproof covering layer 64.
- the waterproof covering layer 64 of the present embodiment is optional, if the waterproof covering layer 64 is not used, it is necessary to produce a non-glue spraying process between the outer non-woven fabric 13 and the base film 15 in the production process of the diapers.
- the areas form parts that can be separated from each other and thus constitute the inner pocket 26, in which case the outer nonwoven 13 can be considered as a water-repellent covering and can act as a short-circuit protection mechanism.
- local spray glue usually has a certain degree of divergence, and the size of the built-in pocket produced by it may have a certain error, but it can be used in the case of low requirements.
- the other side (inner surface 62) of the bottom film 15 without the sensing lines will face the absorbing layer and act as a sensing surface, while the bottom film 15 itself will play the role of connecting the sensing lines 21, 22 and the sensing surface 62 to each other.
- liquid 14 containing electrolyte exists in absorbing layer 12
- liquid 14 will form electrolytic capacitor C1 together with dielectric layer 15 and sensing lines (electrodes) 21 and 22.
- the wet state on the sensing surface can be known , so that the wet state detection function for the absorbent layer of diapers can be realized.
- the outer layer non-woven fabric 13 of the present embodiment can be an optional integrally cut intact non-woven fabric, which can be made of materials such as composite non-woven fabric, hydrophobic non-woven fabric, water-repellent non-woven fabric, and the built-in pocket 26 can be It is arranged at the front end of the diaper and extends all the way to the edge, so that a hidden opening can be formed at the front edge, and the sensor 30 can be inserted into the built-in pocket 26 from the invisible opening.
- the sensing lines 21, 22 are covered with the outer layer of non-woven fabric 13 and the waterproof covering layer 64, the influence of the color of the sensing lines on the appearance of the diaper can be reduced or eliminated, and at the same time, the outer surface of the diaper can be eliminated. The influence of humidity on the sensing line to avoid false alarms.
- Fig. 10A and Fig. 10B are the front structural schematic diagrams and the corresponding D-D' cross-sectional structural schematic diagrams of a capacitive sensing film including head and tail built-in pockets suitable for the smart absorbent article according to the embodiment of the present invention.
- the sensing film itself does not have a pocket, and needs to form a built-in pocket together with other materials, such as the waterproof covering layer 24 , the bottom film 15 or the outer non-woven fabric 13 .
- a waterproof covering layer is integrated on the sensing film in advance to form a sensing film with a pocket and a short circuit protection mechanism, which can bring convenience to the application of the sensing film and the production of smart diapers.
- the sensing film 40 of this embodiment includes a plastic film substrate 45, an induction line 21/22 arranged on one side of the plastic film substrate, and a waterproof covering layer 64 covering the induction line, which completely seals the induction line 21, 22 Protect up.
- both include a mutually bonded part (middle section), and also include mutually detachable parts (head and tail ends), wherein the detachable parts included at the front edge 68 place The part constitutes the functional pocket 26, while the mutually separable parts included at the rear end edge 69 of the sensing membrane constitute the redundant pocket 26'.
- the induction wires 21, 22 are exposed in these two pockets, and the plane where they are located constitutes the contact surface 61, so as to contact and implement electrical connection with the contacts of the inductor inserted into the pocket, and the corresponding area also constitutes the contact area of the induction film at the same time .
- the waterproof cover 64 is bonded to the plastic film substrate 45, which forms part of the short circuit protection mechanism and
- the sensing area constituting the sensing film can be used to detect the wet state on the outer surface 62 of the plastic film substrate 45 or the outer surface 63 of the waterproof covering layer 64 .
- a breakpoint 65 is also included, which can make the ends of the sensing lines 21 and 22 not communicate with each other, and prevent the short circuit of the sensing lines in the redundant pocket 26' from affecting the sensing lines of the functional pocket 26. work.
- the break point 65 can also be used as a positioning mark, which helps to arrange the sensing film at a proper position of the diaper.
- the sensing film When the sensing film is used in a diaper, its front edge 68 is usually flush with the front edge 18 of the diaper, and the sensing area corresponds to the absorbent layer of the diaper.
- the plastic film substrate 45 can form a dielectric layer facing the absorbing layer and the outer surface 62 can form a sensing surface
- the waterproof covering layer 64 can form a dielectric layer facing the absorbing layer and the outer surface 63 can form a sensing surface.
- the sensing lines 21 and 22 can pass through the corresponding dielectric layer and detect the wet state of the absorbing layer corresponding to the sensing surface in the form of electrolytic capacitance, and its detection sensitivity (the ability to generate electrolytic capacitance) is proportional to the dielectric constant of the dielectric layer, and The thickness of the dielectric layer is inversely proportional.
- Figure 11A, Figure 11B and Figure 11C are a schematic diagram of the front structure of a capacitive sensing film including a through-type built-in pocket suitable for the smart absorbent article of the embodiment of the present invention, the corresponding structural schematic diagram of the EE' cross-sectional view and the sensor Schematic diagram of the positional relationship when inserted.
- the plastic film substrate 45 and the waterproof covering layer 64 of this embodiment are bonded at the edges of both sides to form bonding areas respectively. 28 and 28', which can be bonded with adhesive or hot-pressed.
- EVA, TPU, PES, PVC and other hot-melt adhesive films can be selected as the waterproof covering layer.
- bonding at the edges on both sides of the sensing film forms a boundary that can prevent liquid from penetrating in, and constitutes the short-circuit protection mechanism of the embodiment of the present invention, so that the sensing lines 21 and 22 are effectively protected, while the hollow part constitutes A through built-in pocket, the through pocket also forms a pocket with openings at the left and right ends of the sensing film, which are respectively functional pocket 26 and redundant pocket 26'.
- the plastic film substrate 45 of the present embodiment is provided with this side of induction line 21,22 as contact surface 61, and the other side that plastic film substrate 45 does not have induction line exists is induction surface 62, and plastic film substrate 45 constitutes dielectric layer,
- the sensing lines 21 and 22 pass through the dielectric layer 45 and detect the wet state on the sensing surface 62 in an electrolytic capacitive manner.
- the sensing film in this embodiment does not distinguish between the sensing area and the contact area, or any section of the sensing film includes both the sensing area and the contact area.
- the waterproof covering layer 64 of this embodiment is only used as a protective layer for the sensing line and not as a dielectric layer.
- the sensing film of this embodiment has a built-in pocket and a short-circuit protection mechanism, and can be conveniently installed on any layer of the diaper, as long as the sensing surface 62 faces the absorbent layer 12 of the diaper. At the same time, since the sensing film of this embodiment is completely symmetrical, it does not need to be positioned during the production process of smart absorbent products. These features make it more versatile and convenient in application.
- the sensing film of this embodiment can be cut and used at any length. For example, it can be selected to be as long as the diaper, so that its front edge 68 is flush with the front edge 18 of the diaper. The edge 18 protrudes from which the sensor can be inserted for use.
- the induction film can also be packaged into a large roll of rolls. Each roll of induction film can produce thousands of smart diapers, making the induction film a common raw material for the production of smart diapers.
- the pocket in this embodiment is a through pocket
- the sensor design with flip cover as shown in FIG. 11C can be adopted.
- the sensor 30 includes an insertion portion 301 and a flip cover 302 , both of which are hinged by a hinge 303 .
- the flip cover 302 When in use, the flip cover 302 can be opened first, and then the inserting part 301 can be inserted into the built-in pocket 26, so that the contacts 31/32 are in face-to-face contact with the induction wires 21/22, and then the flip cover 302 can be closed and the plastic film base
- the material 45 is clamped, which not only makes the contact between the contact of the sensor and the induction line more reliable, but also prevents the sensor from slipping from the through pocket to a deeper position.
- this sensor design is also suitable for application in other embodiments of the present invention.
- Fig. 12 is a schematic diagram of the appearance structure of the elastic waist of the intelligent absorbent article according to the embodiment of the present invention, which includes a built-in pocket.
- the diapers of this embodiment are underwear type diapers including elastic waist 27, such as pull-up pants, training pants, growth pants and the like.
- the built-in pocket 26 is arranged in the interlayer of the elastic waist 27.
- the elastic force generated on the elastic waist can be converted into a vertical force that presses the built-in pocket 26 to the user's body, which can effectively push the pocket
- the inductor 30 in 26 is compressed and fixed, and makes the contact of the contact of the inductor 30 and the induction lines 21, 22 on the contact surface of the induction film 40 contact more reliably.
- the sensing area of the sensing film 40 of this embodiment corresponds to the absorbent layer 12 of the diaper, while the contact area of the sensing film 40 is located in the built-in pocket 26 of the elastic waist of the diaper, that is to say, the two are separated from each other in position. , which can further prevent the moisture in the absorbing layer 12 from penetrating into the contact area and short-circuiting the sensing line, which can also be regarded as a short-circuit protection mechanism.
- the sensing film 40 can adopt any one of the foregoing embodiments, and the built-in pocket 26 can extend to the waistline edge of the diaper and include an opening leading to the built-in pocket in the interlayer gap at the edge, so that the moisture detection can be inserted through the opening The sensor 30.
- Fig. 13 is a schematic diagram of the exterior structure of the intelligent absorbent article according to the embodiment of the present invention, including a cutout leading to the built-in pocket.
- the opening of the functional pocket 26 is generally located at the front edge of the diaper, and the interlayer gap between the contact surface 61 of the sensing film and the bottom film 15 or the waterproof covering layer 24/64 is used as an invisible opening to use.
- the sensor can also be put into the built-in pocket for use by making a cut on the outer surface or the inner surface of the diaper.
- the smart diaper 10 of this embodiment includes components such as a surface layer 11, an absorbent layer 12, a bottom film 15, a sensing film 40, and a waterproof covering layer 24.
- the sensing film includes sensing lines 21, 22, and the contact surface of the sensing film 40 is in contact with the waterproof
- the cover layer or the bottom film include parts that can be separated from each other and form a built-in pocket 26.
- a cutout 23 is also included on the outer surface of the diaper or on the inner surface at the front edge. The cutout 23 leads to the built-in pocket 26, which can be passed through The cutout 23 puts the sensor 30 into the built-in pocket 26 for use.
- Fig. 14 and Fig. 15 are schematic diagrams of the appearance structure of the sensing film with a loop-shaped sensing line design and a plurality of sensing lines design suitable for the smart absorbent article according to the embodiment of the present invention.
- the sensing film 40 includes a contact area 43, a sensing area 47 and a redundant area 48.
- the contact area 43 corresponds to the front edge of the diaper, which includes exposed sensing lines and constitutes a contact surface, where functional The pocket is also used for contact and electrical connection with the inserted sensor;
- the redundant area 48 corresponds to the rear edge of the diaper, where redundant pockets can be generated and redundancy is provided for cutting off the diaper;
- the sensing area 47 is Corresponding to the crotch position of the diaper, it is used to detect the wet state of the absorbent layer of the diaper.
- the sensing area 47 includes a back-shaped sensing line design, which includes 6 sensing lines from top to bottom, wherein the odd-numbered sensing lines are connected to the sensing line 22, and the even-numbered sensing lines are connected to the sensing line 22. 21 connections, this method can effectively expand the coverage area and detection range of the sensing area 47.
- the sensing area 47 of the embodiment shown in Figure 15 then includes 7 sensing lines (from 51 to 57) parallel to each other, this design can also effectively expand the coverage of the sensing lines and provide information on the wet state in more positions . It should be noted that these sensing line patterns in this embodiment are asymmetrical from head to tail. In order to allow the sensing film to be accurately embedded in a specific position of the diaper, positioning marks 42 are also included on the sensing film 40 .
- the sensing film of the embodiment of the present invention can also have more structural forms and more sensing line pattern designs, and corresponding changes can be made on the basis of the foregoing embodiments in combination with actual needs.
- the built-in pocket is arranged on the front front of the diaper, and it can also be arranged on other positions of the diaper in practical applications, for example, on the crotch, back or side of the diaper, As long as there are sensing films/sensing lines passing through these places.
- an intelligent wet state monitoring system can be formed as long as a sensor 30 is inserted into the built-in pocket 26 .
- the sensor will include at least two contacts to contact and electrically connect the first and second sensing lines, and the sensor will also include a capacitance detection device to detect the absorption of absorbent articles through electrolytic capacitance. wet state.
- the sensor preferably has four or more contacts, two of which can constitute an insertion detection device.
- the sensor can usually also include a wireless transmitting device, and a wireless receiving device can also be provided to match it, so that the wet state information of the absorbent article can be sent and received wirelessly.
- the wireless receiving device usually includes an audible and visual alarm device, Smartphone or PC.
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Abstract
Description
Claims (15)
- 一种基于电容式感应膜及内置式口袋的智能吸收用品,其特征在于,包括一次性吸收用品、电容式感应膜、内置式口袋及短路保护机制,所述一次性吸收用品包括面层、吸收层及底膜,所述感应膜包括接触面、感应面、电介质层及至少二条感应线,所述电介质层的外表面构成所述感应面,所述电介质层将所述感应线与所述感应面相互分隔及绝缘,当所述感应面被包含电解质的液体浸润时,所述感应线可通过所述电介质层并以电解电容方式实现所述感应面的潮湿检测功能,所述内置式口袋用于插入实施潮湿检测的感应器,所述接触面为所述感应器与所述感应线的面对面接触及电连接提供便利,所述短路保护机制用于保护所述感应线令其免受所述一次性吸收用品内外潮湿的影响。
- 如权利要求1所述的智能吸收用品,其特征在于,所述感应线至少有一部分位于所述接触面之内并包括裸露部分,所述短路保护机制包括防水覆盖层,其覆盖在所述接触面上,所述接触面与所述防水覆盖层之间包括可相互分离的部分并构成所述内置式口袋,所述感应面朝向所述吸收层,令所述感应线可通过所述电介质层并以电解电容方式实现针对所述吸收层的潮湿检测功能。
- 如权利要求2所述的智能吸收用品,其特征在于:所述感应膜包括单面式感应膜,所述电介质层包括塑料薄膜基材,所述感应线设置在所述塑料薄膜基材的其中一面上构成所述接触面,所述塑料薄膜基材的另一面构成所述感应面,所述底膜构成所述防水覆盖层,所述接触面朝向所述底膜,并与所述底膜之间包括可相互分离的部分并构成所述内置式口袋,所述吸收层覆盖在所述感应面上,所述面层覆盖在所述吸收层上,所述面层超越所述吸收层及所述感应面的部分与所述底膜相互粘合,由此将所述内置口袋固定并令其与所述感应膜宽度一致并置中对齐;或所述感应膜包括复合式感应膜,所述复合式感应膜包括塑料薄膜基材,所述感应线设置在所述塑料薄膜基材的其中一面上,所述复合式感应膜还包括接触区及感应区,所述感应区包括防水保护层并对所述感应线实施保护,所述塑料薄膜基材的外表面朝向所述吸收层并构成所述电介质层,所述接触区上的感应线包括裸露部分并构成所述接触面,所述底膜构成所述防水覆盖层并覆盖在所述接触面上,所述吸收层覆盖在所述感应面上,所述面层覆盖在所述吸收层上,所述面层超越所述吸收层及所述感应面的部分与所述底膜相互粘合,由此将所述内置口袋固定并令其与所述感应膜宽度一致并置中对齐;或所述感应膜包括复合式感应膜,所述复合式感应膜包括塑料薄膜基材,所述感应线设置在所述塑料薄膜基材的其中一面上,所述复合式感应膜还包括接触区及感应区,所述感应区包括防水保护层并对所述感应线实施保护,所述接触区上的感应线包括裸露部分并构成所述接触面,所述防水保护层朝向所述吸收层并构成所述电介质层,所述感应膜位于所述面层与所述底膜之间并与所述 面层、防水覆盖层及所述底膜相互粘合,由此将所述内置口袋固定并令其与所述感应膜宽度一致并置中对齐;或所述感应膜包括头尾式内置口袋的感应膜,所述感应膜包括塑料薄膜基材,所述感应线设置在所述塑料薄膜基材的其中一面上,所述防水覆盖层覆盖在所述感应线上,所述防水覆盖层与所述塑料薄膜基材于中段位置包括相互粘合的部分并构成感应区,及于头尾两端位置包括可相互分离的部分并构成内置式口袋,所述塑料薄膜基材或所述防水覆盖层的外表面朝向所述吸收层并构成所述感应面;或所述感应膜包括贯通式内置口袋的感应膜,所述感应膜包括塑料薄膜基材,所述感应线设置在所述塑料薄膜基材的其中一面上并构成所述接触面,所述塑料薄膜基材的另一面朝向所述吸收层并构成所述感应面,所述塑料薄膜基材构成所述电介质层,所述防水覆盖层覆盖在所述接触面上,所述防水覆盖层与所述塑料薄膜基材的两边的边缘处包括相互粘合的部分并构成阻止液体渗透进入的边界,所述防水覆盖层与所述塑料薄膜基材之间还包括中空部分并构成一个贯通式的内置式口袋;或所述感应膜包括复合底膜式感应膜,所述感应线设置在所述底膜的外表面上构成所述接触面,所述底膜的内表面朝向所述吸收层构成所述感应面,所述底膜构成所述电介质层,所述防水覆盖层包括一体化剪裁的完好无缺的外层无纺布,其覆盖在所述接触面上并与所述底膜复合构成复合底膜,所述外层无纺布与所述底膜之间还包括可相互分离的部分并构成所述内置式口袋;或包括外层无纺布,所述感应膜包括复合底膜式感应膜,所述感应线设置在所述底膜的外表面上构成所述接触面,所述底膜的内表面朝向所述吸收层构成所述感应面,所述底膜构成所述电介质层,所述防水覆盖层覆盖在所述感应线上,所述外层无纺布覆盖在所述防水覆盖层上,其在宽度上超越所述防水覆盖层的部分与所述底膜粘合构成复合底膜,由此可将所述防水覆盖层及所述内置口袋固定并令所述内置口袋与所述防水覆盖层宽度一致。
- 如权利要求3所述的智能吸收用品,其特征在于,在所述一次性吸收用品的前端边缘处的夹层中包括一个隐形开口,所述隐形开口通向所述内置式口袋,用于插入感应器以实现所述潮湿检测功能;或在所述一次性吸收用品的前端边缘处及后端边缘处的夹层中各包括一个隐形开口,所述隐形开口各通向一个内置式口袋,其中位于所述前端边缘处的内置式口袋构成功能性口袋,用于插入感应器以实现所述潮湿检测功能,而位于所述后端边缘处的内置式口袋构成冗余性口袋,为所述智能吸收用品生产的定位切断提供误差冗余;或于所述一次性吸收用品的外表面或前端边缘的内表面上包括一切口,所述切口通向所述内置式口袋,用于插入感应器以实现所述潮湿检测功能。
- 如权利要求4所述的智能吸收用品,其特征在于,所述一次性吸收用品包括前腹贴及左右贴,所述内置式口袋至少有一部分位于所述前腹贴的正投影范围之内;当所述一次性吸收用品处于穿着状态时,其腰围上产生的弹力可转化为将所述内置式口袋贴向使用者前腹部的作用力,由此可将设置在所述内置式口袋内的感应器压紧并令所述感应器的触点与所述感应线的接触更为可靠;而当所述一次性吸收用品处于非穿着状态时,所述贴向使用者前腹部的作用力会自动消失并令所述感应器易于取出。
- 如权利要求4所述的智能吸收用品,其特征在于,所述一次性吸收用品包括弹性腰围,所述内置式口袋设置在所述弹性腰围上,当所述智能吸收用品处于穿着状态时,在所述弹性腰围上产生的弹力可转化为将所述内置式口袋贴向使用者身体的作用力,由此可将设置在所述内置式口袋内的感应器压紧并令所述感应器的触点与所述感应线的接触更为可靠。
- 如权利要求4所述的智能吸收用品,其特征在于,所述一次性吸收用品包括纸尿裤、纸尿片、卫生巾、产妇巾或尿垫,所述面层包括亲水无纺布,所述吸收层包括高分子吸收材料,所述底膜包括透气或不透气的PE膜,所述感应线包括导电油墨印刷而成的油墨线、物理气相沉积而成的金属线或铝箔线、铜箔线,所述塑料薄膜基材包括PE、PP、CPP、BOPP或PET薄膜,所述防水覆盖层包括塑料薄膜、防水纸或拒水无纺布,所述防水保护层包括高分子防水涂层或高分子防水复合层,所述包含电解质的液体包括包含盐分的尿液、稀大便、汗液或血液。
- 如权利要求4所述的智能吸收用品,其特征在于,当所述一次性吸收用品的吸收层被包含电解质的液体浸润时,所述感应线、电介质层及所述液体一起构成一电解电容器,其中所述感应线构成所述电解电容器的电极,所述电介质层构成所述电解电容器的电介质,所述液体构成所述电解电容器的电解质,所述一次性吸收用品的潮湿程度与所述电解电容器的电容量成正比,所述电容量与所述液体与所述感应线相对应的面积成正比,与所述电介质层的介电常数成正比,与所述电介质层的厚度成反比。
- 一种适合制作如权利要求1所述的智能吸收用品的包括头尾式内置口袋的电容式感应膜,其特征在于,包括塑料薄膜基材、防水覆盖层及至少两条感应线,所述感应线设置在所述塑料薄膜基材的其中一面上,所述防水覆盖层覆盖在所述感应线上,所述防水覆盖层与所述塑料薄膜基材在中段位置上包括相互粘合的部分构成受保护的感应区,可防止液体渗透进入导致所述感应线短路,所述防水覆盖层与所述塑料薄膜基材在头尾两端包括可相互分离的部分并构成接触区,其中位于前端边缘处的接触区构成功能性口袋,所述感应线于所述功能性口袋内裸露并构成接触面,用于与插入口袋的感应器的触点面对面接触并实施电连接,而位于后端边缘处的接触区则构成冗余性口袋,可为所述智能吸 收用品生产的定位切断提供误差冗余;及所述塑料薄膜基材或所述防水覆盖层构成电介质层,其外表面构成感应面,所述感应线可通过所述电介质层并以电解电容方式检测所述感应面上的潮湿状态,检测灵敏度与电介质层的介电常数成正比,与电介质层的厚度成反比。
- 如权利要求9所述的电容式感应膜,其特征在于,所述感应线包括导电油墨印刷而成的油墨线、物理气相沉积而成的金属线或铝箔线、铜箔线,所述塑料薄膜基材包括PE、PP、CPP、BOPP或PET薄膜,所述防水覆盖层包括塑料薄膜、防水纸、拒水无纺布或热熔胶膜。
- 一种适合制作如权利要求1所述的智能吸收用品的包括贯通式内置口袋的电容式感应膜,其特征在于,包括塑料薄膜基材、防水覆盖层及至少两条感应线,所述感应线设置在所述塑料薄膜基材的其中一面上,所述防水覆盖层覆盖在所述感应线上,所述防水覆盖层与所述塑料薄膜基材的两边在边缘处包括相互粘合的部分并由此生成阻止液体渗透进入的边界并构成短路保护机制,所述防水覆盖层与所述塑料薄膜基材之间包括中空的部分并构成贯通式内置口袋,所述感应线于所述内置口袋内裸露并构成接触面,用于与插入所述内置口袋的感应器的触点面对面接触并实施电连接;及所述塑料薄膜基材构成电介质层,其外表面构成感应面,所述感应线可通过所述电介质层并以电解电容方式检测所述感应面上的潮湿状态,其检测灵敏度与所述电介质层的介电常数成正比,与所述电介质层的厚度成反比。
- 如权利要求11所述的智能吸收用品,其特征在于,所述感应线包括导电油墨印刷而成的油墨线、物理气相沉积而成的金属线或铝箔线、铜箔线,所述塑料薄膜基材包括PE、PP、CPP、BOPP或PET薄膜,所述防水覆盖层包括塑料薄膜、防水纸、拒水无纺布或热熔胶膜。
- 一种实现智能吸收用品潮湿状态监测的系统装置,其特征在于,包括感应器及如权利要求1所述的智能吸收用品,所述感应器包括至少两个触点,用于与所述内置式口袋内的感应线接触并实施电连接,所述感应器还包括电容检测装置,用于通过电解电容方式实现所述一次性吸收用品的潮湿检测功能。
- 如权利要求13所述的系统装置,其特征在于,所述感应器包括至少三个触点,其中两个触点构成插入检测装置,用于当所述感应器插入到所述内置式口袋并且所述两个触点同时接触到同一感应线时,触发所述插入检测装置并令所述感应器进入工作状态。
- 如权利要求14所述的系统装置,其特征在于,所述感应器还包括无线发射装置及无线接收装置,用于通过无线方式发送及接收所述智能吸收用品的潮湿状态信息,所述无线接收装置包括声光报警装置、智能手机或个人电脑。
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